Legacy Documentation: Version 4.3.0
PropertyDrawer.OnGUI
OnGUI(position: Rect, property: SerializedProperty, label: GUIContent): void;
void OnGUI(Rect position, SerializedProperty property, GUIContent label);
def OnGUI(position as Rect, property as SerializedProperty, label as GUIContent) as void
Parameters

position Rectangle on the screen to use for the property GUI.
property The SerializedProperty to make the custom GUI for.
label The label of this property.
Description

Override this method to make your own GUI for the property.